1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mart [117]
2 years ago
15

Miguel's parents drove him to a track meet that was 305 km away from the school. It took them 3 hours, which included a 30 minut

e break for breakfast. What was their average speed?
A.101.7 km/h
B.915 km/
C.122 km/h
D.275 km/h
Physics
1 answer:
OverLord2011 [107]2 years ago
6 0
A., 101.7 km/h is the correct answer for this question
You might be interested in
STATE THE HOOKE'S LAW
victus00 [196]
The Hooke's law is a principal of physics that states that the force needed to extend or compress a spring by some distance x scales linearly with respect to that distance.
6 0
3 years ago
Read 2 more answers
What is the weight of an object (mass = 60 kilograms) on Mars, where the acceleration due to gravity is 3.75 meters/second2?. Se
Shalnov [3]
Weight = mass * gravity = 60 kg * 3.75 m/s² = 225 N

<span>Option D.</span>
7 0
3 years ago
When droplets of water in the atmosphere act like prisms, the colors in sunlight undergo?
dexar [7]
White light is all the colours of light combined. When the droplets act like prisms, they split the white light into all its colours and also slightly bend the different colours. This is how a rainbow is formed.
4 0
3 years ago
Non-native species that have rapidly increasing populations that spread
hjlf

Answer:

Invasive Species

Explanation:

Plz give brainliest

6 0
3 years ago
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 5.0 rev/s in 8.0 s. At thi
tatiyna

Answer:

50 revolutions

Explanation:

Data provided:

case I: From rest to top spin

The initial angular speed of the washer, ωi = 0 rev /s

Final angular speed of the washer ωf = 5 rev /s

Time taken, t₁ = 8 s

now,  

The angular displacement or the number of revolutions taken (θ₁) is calculated as:

  θ₁ = ωi t₁ + (1/2)α₁t₁²

where,

α is the angular acceleration

The angular acceleration can be calculated as:

  ωf - ωi = α₁t₁

on substituting the values, we get

8α₁ = 5 - 0

or

α₁ = 0.625 rev/s²

substituting the values in the equation for the number of revolutions, we get

θ₁ = 0 + (1/2) (0.625)(8)²

or

θ₁ = 20 revolutions

also,  

For the case II: From top spin to rest

we have

The initial angular speed, ωi = 5 rev /s

and the final angular speed, ωf = 0 rev /s

Total time taken, t₂ = 12 s

Now, angular acceleration for this case

  ωf - ωi = α₂t₂

on substituting the values, we have

  12α₂ = 0 - 5

α₂ = - 0.4166 rev/s²

Therefore, the number of revolutions ( i.e angular displacement  )

θ₂ = ωit₂ + (1/2)α₂t₂²

on substituting the values, we have

θ₂ = 5 × 12 + (1/2)(-0.4166)(12)²

or

θ₂ = 30 rev

Hence,

the total number of revolutions made by the washer during the 20s is  

θ = θ₁ + θ₂

or

θ = 20 rev + 30 rev

or

θ = 50 revolutions

7 0
2 years ago
Other questions:
  • Which condition would cause salinity of ocean water to decrease
    10·2 answers
  • What is the focal length of the mirror? follow the sign conventions?
    9·1 answer
  • Which types of atoms usually<br> become negative ions?
    5·1 answer
  • Similarities in tennis and volleyball
    13·1 answer
  • The evaporation of the oceans surface water as part of the water cycle is caused by
    12·1 answer
  • Assume that a clay model of a lion has a mass of 0.225 kg and travels on the ice at a speed of 0.85 m/s. It hits another clay mo
    8·1 answer
  • The greater the amplitude of a wave, the greater its
    8·1 answer
  • Are the properties of rubidium more like those of cesium or those of strontium ? Explain your ans
    15·1 answer
  • I need Help ASAP I will give you brainlest and plus 5 stars ✨✨and plus thanks and 50 points EVeryONe need help this is due today
    6·1 answer
  • Gestalt Psychology emphasizes that humans perceive the world _________________.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!